Painting a vivid and terrifying picture of war-torn Europe during World War II, this tale chronicles the lives of Anna, a Krakow University professor, and her husband Jan, a Polish cavalryman. After they are separated and forced to flee occupied Poland, Anna soon finds herself caught up in the Belgian Resistance, while Jan becomes embedded in British Intelligence efforts to contact the Resistance in Poland. He soon realises that he must seize this opportunity to search for his lost wife, Anna.